> -----Original Message-----
> From: Murray Leshner
> Sent: Thursday, February 03, 2005 1:28 PM
> Subject: [pinhole-discussion] Slit manufacture
(clip)
> look into electron microscope grids. They are
> typically made by electroplating, are 3-3.15 mm
> diameter with various patterns in them, ranging from a
> limited range of single holes to multiple slits. I'm
> not sure about single slits...
I didn't see any true slits in the catalog, although they may exist.
A slit as short as one in a 3mm disk might not be practical and my
guess is that in practice it would work more like a pinhole. The
slits I've used with 4x5 film are between 2.5 and 3.5 inches long
(about 65mm - 90mm).
Tom
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Received on Thu Feb 3 17:09:40 2005
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